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(ModeL) Patented June 27 1882.

xlimaaaaaz UNITED STATES PATENT OFFICE.

JOHN P. MAHER, OF READING, PENNSYLVANIA, ASSIGNOR. OF ONE-HALF TO LELLIS KURTZ, OF SAME PLACE.

LOCK-HINGE FOR SHUTTERS.

81?]?('JIII:"IGA'.[IO1\T forming part of Letters Patent No. 260,036, dated June 27, 1882.

Application filed March 16, 1882.

tions under which it is locked are sustained.

I am aware that a lock-hinge in itselfis not new; yet, so far as my own knowledge extends, myimprovement is an advance in the art.

Referring to the drawings herewith, formin g part of this specification, in which similar parts have corresponding letters of reference, Figure 1 is a front elevation of a portion of a window frame with a shutter hung thereon. Fig. 2 represents a sectional plan of the same. Fig. 3 represents detail views of the several parts comprising the lock-hinge, in which- A represents a portion of a Window-frame; B, the shutter; O,the shutter-flap ofthe hinge; D, thetjamb-fiap of the hinge; E, a shoulder formed at theupperend of the pintle-cap of the shutter-flap as a seat for the dog-head, and reenforced by an abutment, E, upon the inside face of the hinge F, the dog, having a head, F, fitted to the offset E and abutment E, and a reverse lap, F catching on the back of the jamb-flap D at the rabbet D the tail being provided with a countersunk hole, G, for a screw, G, upon which it is pivoted.

H represents the upper hinges, which are of the usual detachable-butt style, the lock being placed upon the lower set of hinges alone, which is sufficient to retain the shutter in an opened position.

The dog F is recessed into the jamb-flap of the hinge, the recess being provided with an oblong slot, G, in the line of thrust of suitable size to pass the fulcrum-screw G through the same.

The hinges are secured to the jamb and shutter, and the latter is then hung upon the former and swung back against the wall. While in this position the dog-head is brought toa bearin g against the offset E and the screw G inserted and screwed home, leaving sufficient looseness between its head and the tail (Model.)

of the dog to cause it to drop automatically into the recess or offset E when the shutteris opened far enough to permit the same. This arrangement saves considerable time to the carpenter and makes a positive stop of the look.

A large number of the locking-hinges sold by the hardware trade depend for their look upon the lifting of the shutter vertically in the act of closing the shutter-flap, rising upon an incline of more or less height upon the jamb-flap of the hinge, the arrangement being such that when fully open the shutter-flap shall automatically drop into a recess in the jamb-flap at the footof a reverse and much stiffer incline. Hinges have also been sold and used, similar in general appearance to my invention, in which the locking pawl or dog had its fulcrum point fixed and its head dropped over or against the shutter-flap to lock the same. In both forms of hinges, after application, there was no provision for taking up any subsequent looseness which might occur between the shutter and the wall. My improvement provides for thi s,for if subsequent to the original hanging of the shutter or blind any annoying looseness occurs the screw G is withdrawn, the hole plugged up, and then, placing the head of the dog F in contact with recess E, as before described, the screw is again inserted and the new position of the shutter assured, thus correcting the rattling of the shutterin high winds, so annoying to all.

The pintle of the hinge may be enlarged to give sufficient strength and cast with the flap,

or it maybe of wire, as usual in butt and many detachable hinges.

Having described the application of my improvement, I desire to secure by Letters Patent the following'claim In a locking-hinge provided with a dog or pawl, F, abutting against an ofiset, F, on the pintle-cap of the shutter-leaf, and lying within a recess sunk in the jamb-leaf, the oblong slot G, whereby the contact of the shutter with the wall may be adjusted by the shifting of thefulcrum-screw G, substantially as shown, and for the purpose described. 7 7 JOHN P. .MAHER. Witnesses:

F. PIERCE HUMMEL, G. B. STEVENS. 

